JUNE 12, 2021


Location: Grinnell-Newburg High School: 1333 Sunset St. Grinnell, IA 50112
Check-In: 5:45–8:30 a.m.
Start Times: stagger 100 milers at 6 a.m., 50 milers at 7 a.m. & 25 milers at 8 a.m.
Food & Bev: sandwiches, pie slices, snacks, water & soda available for purchase 
Routes: download first 25-mile loop, download second 50-mile loop, download third 100-mile loop, download full route


This event is about staying active and enjoying the great outdoors. With routes spanning 25, 50 and 100 miles, you don’t have to be a pro gravel cyclist to participate.

This year, we’re making registration easy – all we request is a free will donation as your entry fee! A basic donation of $5 will help to cover processing fees. Additional contributions from ten dollars to ten hundred will help to support Imagine Grinnell’s nonprofit initiatives including financial assistance for the JPK Fund, a local mental health consortium.

Everyone who enters receives a free, quality mask with x-frame for comfortable breathing. We will be practicing social distancing and protocols throughout this event with the goal to maintain the health and safety of all our riders!

As with most current events, we reserve the right to cancel. But we’re not planning on it! Be sure to follow us on Facebook and Instagram for event updates – we’ll email important info as well.


In its inaugural year, the Prairie Burn 100 had a great turnout of 161 riders from eight states! To see pictures and a course map from the event, click the links below.​​




  1. Even though this is a laid-back event: YOU ARE RESPONSIBLE FOR YOU. We will have a limited ability to bail you out if you have a bad experience out on the roads. Know how to fix a flat or at least ride with someone who does. Have a cell phone and a bail-out plan if your ride goes up in smoke.​ Call or text one of the event directors on the phone number included on the info card included on the cue sheets. 

  2. Don't be a jerk. Be respectful to your fellow cyclists, the residents of Grinnell and the members of the rural community. Make everyone glad that you are here. 

  3. ​Obey all traffic laws. 100% of the course will be open to vehicle traffic so don't become a hood ornament.​

  4. Stay to right hand side of the road at all times, especially when cresting a hill. This cannot be stressed enough. Again, don't become a hood ornament. 

  5. There are a few sections of paved road. Some of these paved roads might have traffic. And some of that traffic might not see you or care to slow down. Be vigilant and stay to the right. 

  6. ​Each participant is considered to be on a private excursion and remains solely responsible for any accidents in which they might be involved. The event organizers accept no responsibility for participants becoming lost, injured or worse. 

  7. ​Do not litter. 

  8. E-bikes are welcome! 

  9. There will not be a mass-start for the 2021 Prairie Burn. Instead, there will be staggered suggested starting times based on the distance a rider plans on doing. 100 milers suggested start of 6:00am, 50 milers at 7:00am and 25 milers 8:00 am. Feel free to adjust your starting time according to your needs but keep in mind that times that the aid stations will close down at the times listed below. 

  10. Aid stations will be located at the start/finish at the High School and at mile 14.5 on the first loop, at mile 37.4 of the 2nd loop, and a Casey's Convenience store at 73.4 of the final loop. In addition, there may be additional roving support on the final loop.

  11. The aid station at mile 14.5 will close at 10:00am, the mile 34.7 aid station closing at noon, and the finish line area will be shut down promptly at 6:00 PM. Those undertaking the 2nd and 3rd loops should allow themselves enough time to finish before the checkpoints close down. 

  12. Cue cards will be provided for navigation and the route can be downloaded in .FIT, .TCX or .GPX files from www.ridewithgps.com.  Use both so you don't get lost out there. Important note: YOUR GPS WILL BE CONFUSED AT THE START/FINISH AREA because the route overlaps at some locations. Your GPS will not magically know which loop you are on. To remedy this, follow the written cues for your desired route until you are a few blocks from the high school. 




Staying in Grinnell? Download our restaurant guide!